A Caltech Library Service

Biogeochemistry of the Stable Isotopes of Hydrogen and Carbon in Salt Marsh Biota

Smith, Bruce N. and Epstein, Samuel (1970) Biogeochemistry of the Stable Isotopes of Hydrogen and Carbon in Salt Marsh Biota. Plant Physiology, 46 (5). pp. 738-742. ISSN 0032-0889. PMCID PMC396670.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Deuterium to hydrogen ratios of 14 plant species from a salt marsh and lagoon were 55‰ depleted in deuterium relative to the environmental water. Carbon tetrachloride-extractable material from these plants was another 92‰ depleted in deuterium. This gave a fractionation factor from water to CCl_4, extract of 1.147. This over-all fractionation was remarkably constant for all species analyzed. Plants also discriminate against ^(13)C, particularly in the lipid fraction. Data suggest that different mechanisms for carbon fixation result in different fractionations of the carbon isotopes. Herbivore tissues reflected the isotopic ratios of plants ingested. Apparently different metabolic processes are responsible for the different degrees of fractionation observed for hydrogen and carbon isotopes.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle
Additional Information:© 1970 American Society of Plant Biologists (ASPB). This work was generously supported by the National Science Foundation, Grant BG 7517. We wish to thank Dr. Ian Kaplan and Dr. John Warme of the Geology Department, University of California, Los Angeles, for assistance in making collections at Point Mugu. Discussions of our data with Dr. Kaplan have also been most helpful. The technical assistance of Mr. Joop Goris and Mrs. Jane Young is gratefully acknowledged.
Funding AgencyGrant Number
NSFBG 7517
Issue or Number:5
PubMed Central ID:PMC396670
Record Number:CaltechAUTHORS:20151116-134628525
Persistent URL:
Official Citation:Smith, Bruce N., and Samuel Epstein. “Biogeochemistry of the Stable Isotopes of Hydrogen and Carbon in Salt Marsh Biota”. Plant Physiology 46.5 (1970): 738–742
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62131
Deposited By: Tony Diaz
Deposited On:18 Nov 2015 19:46
Last Modified:03 Oct 2019 09:15

Repository Staff Only: item control page